<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addRoleDialogVisible = true">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
              <!-- 展开列 -->
              <el-table-column type="expand">
                <template slot-scope="scope">
                  <el-row :class="['bdbottom', i1 === 0 ? 'bdtop': '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                    <!-- 渲染一级权限 -->
                    <el-col :span="5">
                      <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!-- 渲染二级和三级权限 -->
                    <el-col :span="19">
                      <!-- 通过for循环嵌套渲染二级权限 -->
                      <el-row :class="[i2 === 0 ? '':'bdtop', 'vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                        <!-- 渲染二级权限 -->
                        <el-col :span="6">
                          <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                          <i class="el-icon-caret-right"></i>
                        </el-col>
                        <el-col :span="18">
                          <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id"
                          closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                        </el-col>
                      </el-row>
                    </el-col>
                  </el-row>
                </template>
              </el-table-column>
              <!-- 索引列 -->
              <el-table-column type="index"></el-table-column>
              <el-table-column label="角色名称" prop="roleName"></el-table-column>
              <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
              <el-table-column label="操作" width="300px">
                <template slot-scope="scope">
                  <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditRoleDialog(scope.row.id)">编辑</el-button>
                  <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
                  <el-button type="warning" icon="el-icon-setting" size="mini"
                  @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
              </el-table-column>
            </el-table>
        </el-card>

        <!-- 分配权限的对话框 -->
        <el-dialog
          title="提示"
          :visible.sync="setRightDialogVisible"
          width="50%" @close="setRightDialogClosed">
          <!-- 树形控件 -->
          <el-tree :data="rightslist" :props="treeProps" show-checkbox
          node-key="id" default-expand-all :default-checked-keys="defKeys"
          ref="treeRef"></el-tree>
          <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
          </span>
        </el-dialog>

        <!-- 添加角色的对话框 -->
        <el-dialog
            title="添加角色"
            :visible.sync="addRoleDialogVisible"
            width="50%" @close="addRoleDialogClosed">
            <!-- 内容主体区 -->
            <el-form :model="addRoleForm" :rules="addRoleFormRules" ref="addRoleFormRef" label-width="80px" >
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRole">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改角色的对话框 -->
        <el-dialog
            title="修改角色"
            :visible.sync="editRoleDialogVisible"
            width="50%" @close="editRoleDialogClosed">
            <!-- 内容主体区 -->
            <el-form :model="editRoleForm" :rules="editRoleFormRules" ref="editRoleFormRef" label-width="80px" >
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="editRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRoleInfo">确 定</el-button>
            </span>
        </el-dialog>

    </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框的显示和隐藏
      setRightDialogVisible: false,
      // 权限数据
      rightslist: [],
      // 树形控件的数据绑定对象
      treeProps: {
        children: 'children',
        label: 'authName'
      },
      // 默认选中的节点Id值数组
      defKeys: [],
      // 当前即将分配权限的角色ID
      roleId: '',
      // 控制添加角色的对话框的显示和隐藏
      addRoleDialogVisible: false,
      // 添加角色的表单
      addRoleForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加角色表单的验证规则
      addRoleFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      },
      // 控制修改角色的对话框的显示和隐藏
      editRoleDialogVisible: false,
      // 修改角色的表单
      editRoleForm: {},
      // 修改角色表单的验证规则
      editRoleFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' }
        ]
      }
    }
  },
  created () {
    this.getRoleList()
  },
  methods: {
    // 获取所有角色的列表
    async getRoleList () {
      const { data: res } = await this.$http.get('roles')
      // console.log(res)
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败！')

      this.rolelist = res.data

      console.log(this.rolelist)
    },
    // 根据ID删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      // console.log('确认了删除')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }

      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }
      // 把获取到的权限数据保存到data的rightslist中
      this.rightslist = res.data
      // console.log(this.rightslist)

      // 递归获取三级节点的ID
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys (node, arr) {
      // 如果当前节点没有children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item =>
        this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击确定为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      // console.log(keys)

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配角色权限失败!')
      }

      this.$message.success('分配角色权限成功!')
      this.getRoleList()
      this.setRightDialogVisible = false
    },
    // 添加角色-提交数据
    addRole () {
      this.$refs.addRoleFormRef.validate(async valid => {
        if (!valid) return false
        // 可以发起请求
        const { data: res } = await this.$http.post('roles', this.addRoleForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败！')
        }

        this.$message.success('添加角色成功！')

        this.addRoleDialogVisible = false

        this.getRoleList()
      })
    },
    // 监听添加角色对话框关闭事件
    addRoleDialogClosed () {
      this.$refs.addRoleFormRef.resetFields()
    },
    // 弹出修改角色对话框
    async showEditRoleDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色信息失败')
      }
      this.editRoleForm = res.data
      this.editRoleDialogVisible = true
    },
    // 监听修改角色对话框的关闭事件
    editRoleDialogClosed () {
      this.$refs.editRoleFormRef.resetFields()
    },
    // 修改角色信息并提交
    editRoleInfo () {
      console.log(this.editRoleForm)
      this.$refs.editRoleFormRef.validate(async valid => {
        if (!valid) return false
        // 可以提交修改角色的请求
        const { data: res } = await this.$http.put('roles/' + this.editRoleForm.roleId, { roleName: this.editRoleForm.roleName, roleDesc: this.editRoleForm.roleDesc })
        if (res.meta.status !== 200) {
          return this.$message.error('修改角色信息失败！')
        }

        this.editRoleDialogVisible = false
        this.getRoleList()
        this.$message.success('修改角色信息成功！')
      })
    },
    // 删除角色By ID
    async removeRoleById (id) {
      // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消删除，则返回值为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }

      const { data: res } = await this.$http.delete('roles/' + id)

      if (res.meta.status !== 200) return this.$message.error('删除角色失败！')
      // console.log('确认了删除')
      this.$message.success('删除角色成功！')

      this.getRoleList()
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
